Results 41 to 50 of about 434,628 (281)

Algebraic Signal Processing Theory: Cooley-Tukey Type Algorithms for Polynomial Transforms Based on Induction [PDF]

, 2010
A polynomial transform is the multiplication of an input vector $x\in\C^n$ by a matrix $\PT_{b,\alpha}\in\C^{n\times n},$ whose $(k,\ell)$-th element is defined as $p_\ell(\alpha_k)$ for polynomials $p_\ell(x)\in\C[x]$ from a list $b=\{p_0(x),\dots,p_{n ...
Kovacevic, Jelena, Pueschel, Markus, Sandryhaila, Aliaksei   +2 more
core  

Hematopoietic (stem) cells—The elixir of life?

FEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo, Jonah Anderson, Emilie Dinh Vedrenne, Noël Yeh Martín, Jette Lengefeld   +4 more
wiley   +1 more source

Matrix Factorization and Some Fast Discrete Transforms

Axioms
In this paper, three discrete transforms related to vector spaces over finite fields are studied. For our purposes, and according to the properties of the finite fields, the most suitable transforms are as follows: for binary fields, this is the Walsh ...
Iliya Bouyukliev, Mariya Dzhumalieva-Stoeva, Paskal Piperkov   +2 more
doaj   +1 more source

Image Compression Based on a Partially Rotated Discrete Cosine Transform With a Principal Orientation

IEEE Access, 2021
Image transforms are necessary for image and video compression. Analytic transforms are powerful in compacting natural signals for wider exploitation. Various methods have been introduced to represent such data as a small number of bases, and several of ...
Gihwan Lee, Yoonsik Choe
doaj   +1 more source

Tomograms and other transforms. A unified view

, 2001
A general framework is presented which unifies the treatment of wavelet-like, quasidistribution, and tomographic transforms. Explicit formulas relating the three types of transforms are obtained.
Ali T, Atakishiyev N M, Chui C K, Cohen L, Combes J M, Dodonov V V, Flandrin P, Fourier J B J, Granieri S, Husimi K, Kano Y, M A Man'ko, Mancini S, Nieto L M, Pouarikas A D, Qian S, R Vilela Mendes, Reed M, V I Man'ko, Ville J, Wolf K-B   +20 more
core   +2 more sources

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

FEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source

Solving ill-conditioned linear equations using simulated annealing method [PDF]

Journal of Hyperstructures, 2018
The purpose of this paper is to using the Simulated Annealing method to solving a linear equations system which have an ill-conditioned coefficients matrix. A linear equation system is called ill-conditioned if its condition number be large.
Mojtaba Moradi
doaj   +1 more source

Nonlocal PT-symmetric integrable equations and related Riemann–Hilbert problems

Partial Differential Equations in Applied Mathematics, 2021
We aim to discuss about how to construct and classify nonlocal PT-symmetric integrable equations via nonlocal group reductions of matrix spectral problems.
Wen-Xiu Ma
doaj   +1 more source

Matrix generalizations of some dynamic field theories

, 1995
We introduce matrix generalizations of the Navier--Stokes (NS) equation for fluid flow, and the Kardar--Parisi--Zhang (KPZ) equation for interface growth.
A. Zee, Ala-Nissila, Barabasi, Barma, Bouchaud, Bouchaud, Brézin, Brézin, Brézin, DeDominicis, Deker, Doherty, Forster, Frey, Halpin-Healy, Hooft, Kardar, Kardar, Kardar, Kolmogorov, Kolmogorov, Krug, Lassig, Medina, Mehran Kardar, Mehta, Moore, Mou, Mou, Porter, Schwartz, Sun, Tu, Voiculescu, Yakhot, Zinn-Justin   +35 more
core   +1 more source

Unconstrained optimal transformation matrix [PDF]

IEEE Transactions on Aerospace and Electronic Systems, 1998
We generalize Brock's minimization of the loss function proposed by Wahba to give a least-squares estimate of satellite attitude. We follow Brock in relaxing Wahba's requirement that the minimizing attitude matrix be orthogonal, and discuss the statistical properties of our new solution and its relation to existing attitude estimation algorithms.
F.L. Markley, I.Y. Bar-Itzhack
openaire   +1 more source